Calculate the distance for target for soil pH in view of the crop production function

This functions evaluates the difference between the measured pH and the optimal pH according to the Bemestingsadvies

Usage

osi_c_ph_nl(
  ID,
  B_LU,
  B_SOILTYPE_AGR,
  A_SOM_LOI,
  A_CLAY_MI,
  A_PH_CC,
  unitcheck = TRUE
)

Arguments

ID

(character) A field id

B_LU

(numeric) The crop code

B_SOILTYPE_AGR

(character) The agricultural type of soil

A_SOM_LOI

(numeric) The organic matter content of soil in percentage

A_CLAY_MI

(numeric) The percentage of clay (%)

A_PH_CC

(numeric) The pH-CaCl2 of the soil

unitcheck

(character) Option to switch off unit checks (TRUE or FALSE)

Value

The osi indicator for the soil pH

References

Handboek Bodem en Bemesting tabel 5.1, 5.2 en 5.3